Everyone says shifu, but I don't know if shifu is the word "master" or "shifu", and shuangjiegun, is it nunchucks or nunchaku?

If you worship the master, then "shifu", one day for the master, lifelong for the father. The nunchaku is the correct solution. Nunchucks is a personal misinterpretation of the word "nunchucks," which appeared when Fong wrote the lyrics for Jay Chou, but "nunchucks" is much more well-known. Double nunchaku means two sections, and it is easy to distinguish "nunchaku" from Cantonese and Minnanhua, and the English word for nunchaku, "nanchaku", is phonetically translated from Japanese, whereas the Japanese word for nunchaku is phonetically translated from the name for nunchaku used in the Fujian area of Guangdong. The name of the nunchaku in Japanese is translated from the name of the nunchaku in Guangdong and Fujian.